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Vulnerability · Published Jun 9, 2026 · Assigned by redhat

CVE-2026-11790389-ds-base: 389-ds-base: pbkdf2 password storage plugin unbounded iteration count denial of service

Medium 4.9

In plain English

A medium-severity uncontrolled resource consumption in Red Hat Directory Server 11 from Red Hat. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 22% of all known vulnerabilities).

Severity (CVSS 3.1)4.9Medium
Exploit odds (30 days)0.3%top 78.2% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official description

A flaw was found in 389 Directory Server. The PBKDF2-SHA256 password storage plugin does not enforce an upper bound on the iteration count extracted from stored password hashes. A privileged attacker who can modify a user's password hash can cause excessive CPU consumption during authentication, resulting in denial of service.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12389-ds-baseno fix listedDEBIAN-CVE-2026-11790
Debian:13389-ds-baseno fix listedDEBIAN-CVE-2026-11790
Ubuntu:22.04:LTS389-ds-baseno fix listedUBUNTU-CVE-2026-11790
Ubuntu:24.04:LTS389-ds-baseno fix listedUBUNTU-CVE-2026-11790
Ubuntu:25.10389-ds-baseno fix listedUBUNTU-CVE-2026-11790
Ubuntu:26.04:LTS389-ds-baseno fix listedUBUNTU-CVE-2026-11790
Ubuntu:26.10389-ds-baseno fix listedUBUNTU-CVE-2026-11790

Affected products (as reported)

VendorProductVersions
Red Hat Red Hat Directory Server 11 see references
Red Hat Red Hat Directory Server 12 see references
Red Hat Red Hat Directory Server 13 see references
Red Hat Red Hat Enterprise Linux 10 see references
Red Hat Red Hat Enterprise Linux 6 see references
Red Hat Red Hat Enterprise Linux 7 see references
Red Hat Red Hat Enterprise Linux 8 see references
Red Hat Red Hat Enterprise Linux 9 see references

Weakness: CWE-400 · Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H

References